New footage in the beginning.
In the comic books for a very long time the only other person who had wielded Thor’s hammer was Cap because he was worthy. Rodgers moving it slightly and Thor’s fading smirk are a nod to that. I wonder if they will take it beyond the nod.
(Later an alien hero named Beta Ray Bill would also be found worthy enough to wield Mjolnir and Odin had a new hammer forged just for him.)